Is there any stronger battery I can get and still use the stock S5 backplate?

I have an Anker 7500mAh battery and it's great, but I kinda miss being able to fit my S5 in my pants "phone pocket" it has on the leg. I was thinking if I could get a battery that can allow me to retain the stock backplate but last longer that'd be great. Wasn't sure if such a thing existed.